Authors:

You must see that if two things are alike, then it is a further question whether the first is copied from the second, or the second from the first, or both from a third.

C. S. Lewis (2014). “The Pilgrim's Regress”, p.67, Wm. B. Eerdmans Publishing
You must see that if two things are alike, then it is a further question whether the first is copied from the second, or the second from the first, or both from a third.